Revert "[Master] Project page caching"

bin/configure-fastly.js

 var async = require('async');
 var defaults = require('lodash.defaults');
 var fastlyConfig = require('./lib/fastly-config-methods');
-const languages = require('../languages.json');
 
 var route_json = require('../src/routes.json');
 
@@ -42,43 +41,23 @@ async.auto({
         // on any of those route conditions.
         var notPassStatement = fastlyConfig.getAppRouteCondition('../build/*', routes, extraAppRoutes, __dirname);
         
+        // For all the routes in routes.json, construct a varnish-style regex that matches
+        // only if NONE of those routes are matched.
+        var passStatement = fastlyConfig.negateConditionStatement(notPassStatement);
+        
         // For a non-pass condition, point backend at s3
-        var recvCondition = '' +
-            'if (' + notPassStatement + ') {\n' +
-            '    set req.backend = F_s3;\n' +
-            '    set req.http.host = \"' + S3_BUCKET_NAME + '\";\n' +
-            '} else {\n' +
-            '    if (!req.http.Fastly-FF) {\n' +
-            '        if (req.http.X-Forwarded-For) {\n' +
-            '            set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For \", \" client.ip;\n' +
-            '        } else {\n' +
-            '            set req.http.Fastly-Temp-XFF = client.ip;\n' +
-            '        }\n' +
-            '    } else {\n' +
-            '        set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For;\n' +
-            '    }\n' +
-            '    set req.grace = 60s;\n' +
-            '    if (req.http.Cookie:scratchlanguage) {\n' +
-            '        set req.http.Accept-Language = req.http.Cookie:scratchlanguage;\n' +
-            '    } else {\n' +
-            '        set req.http.Accept-Language = accept.language_lookup("' +
-                         Object.keys(languages).join(':') + '", ' +
-                         '"en", ' +
-                         'std.tolower(req.http.Accept-Language)' +
-                     ');\n' +
-            '    }\n' +
-            '    if (req.url ~ "^/projects/" && !req.http.Cookie:scratchsessionid) {\n' +
-            '        set req.http.Cookie = req.http.Cookie:scratchlanguage;\n' +
-            '    } else {\n' +
-            '        return(pass);\n' +
-            '    }\n' +
-            '}\n';
- 
+        var backendCondition = fastlyConfig.setBackend(
+            'F_s3',
+            S3_BUCKET_NAME,
+            notPassStatement
+        );
+        // For a pass condition, set forwarding headers
+        var forwardCondition = fastlyConfig.setForwardHeaders(passStatement);
 
         fastly.setCustomVCL(
             results.version,
             'recv-condition',
-            recvCondition,
+            backendCondition + forwardCondition,
             cb
         );
     }],

bin/lib/fastly-config-methods.js

@@ -84,6 +84,45 @@ var FastlyConfigMethods = {
         return 'redirects/' + route.pattern;
     },
 
+    /**
+     * Returns custom vcl configuration as a string for setting the backend
+     * of a request to the given backend/host.
+     *
+     * @param {string} backend   name of the backend declared in fastly
+     * @param {string} host      name of the s3 bucket to be set as the host
+     * @param {string} condition condition under which backend should be set
+     */
+    setBackend: function (backend, host, condition) {
+        return '' +
+            'if (' + condition + ') {\n' +
+            '    set req.backend = ' + backend + ';\n' +
+            '    set req.http.host = \"' + host + '\";\n' +
+            '}\n';
+    },
+
+    /**
+     * Returns custom vcl configuration as a string for headers that
+     * should be added for the condition in which a request is forwarded.
+     *
+     * @param {string} condition condition under which to set pass headers
+     */
+    setForwardHeaders: function (condition) {
+        return '' +
+            'if (' + condition + ') {\n' +
+            '    if (!req.http.Fastly-FF) {\n' +
+            '        if (req.http.X-Forwarded-For) {\n' +
+            '            set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For \", \" client.ip;\n' +
+            '        } else {\n' +
+            '            set req.http.Fastly-Temp-XFF = client.ip;\n' +
+            '        }\n' +
+            '    } else {\n' +
+            '        set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For;\n' +
+            '    }\n' +
+            '    set req.grace = 60s;\n' +
+            '    return(pass);\n' +
+            '}\n';
+    },
+
     /**
      * Returns custom vcl configuration as a string that sets the varnish
      * Time to Live (TTL) for responses that come from s3.
@@ -93,13 +132,9 @@ var FastlyConfigMethods = {
     setResponseTTL: function (condition) {
         return '' +
             'if (' + condition + ') {\n' +
-            '    if (req.url ~ "^/projects/" && !req.http.Cookie:scratchsessionid) {\n' +
-            '        set beresp.http.Vary = "Accept-Encoding, Accept-Language";\n' +
-            '    } else {\n' +
-            '        set beresp.ttl = 0s;\n' +
-            '        set beresp.grace = 0s;\n' +
-            '        return(pass);\n' +
-            '    }\n' +
+            '    set beresp.ttl = 0s;\n' +
+            '    set beresp.grace = 0s;\n' +
+            '    return(pass);\n' +
             '}\n';
     }
 };

test/unit/test_fastly_config_methods.js

@@ -59,17 +59,44 @@ tap.test('getAppRouteCondition', function (t) {
     t.end();
 });
 
+tap.test('testSetBackend', function (t) {
+    var backend = fastlyConfig.setBackend('wemust', 'goback', 'marty');
+    t.equal(backend, '' +
+        'if (marty) {\n' +
+        '    set req.backend = wemust;\n' +
+        '    set req.http.host = \"goback\";\n' +
+        '}\n'
+    );
+    t.end();
+});
+
+tap.test('testSetForward', function (t) {
+    var forward = fastlyConfig.setForwardHeaders('alwaysforward');
+    t.equal(forward, '' +
+        'if (alwaysforward) {\n' +
+        '    if (!req.http.Fastly-FF) {\n' +
+        '        if (req.http.X-Forwarded-For) {\n' +
+        '            set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For ", " client.ip;\n' +
+        '        } else {\n' +
+        '            set req.http.Fastly-Temp-XFF = client.ip;\n' +
+        '        }\n' +
+        '    } else {\n' +
+        '        set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For;\n' +
+        '    }\n' +
+        '    set req.grace = 60s;\n' +
+        '    return(pass);\n' +
+        '}\n'
+    );
+    t.end();
+});
+
 tap.test('testSetTTL', function (t) {
     var ttl = fastlyConfig.setResponseTTL('itsactuallyttyl');
     t.equal(ttl, '' +
         'if (itsactuallyttyl) {\n' +
-        '    if (req.url ~ "^/projects/" && !req.http.Cookie:scratchsessionid) {\n' +
-        '        set beresp.http.Vary = "Accept-Encoding, Accept-Language";\n' +
-        '    } else {\n' +
-        '        set beresp.ttl = 0s;\n' +
-        '        set beresp.grace = 0s;\n' +
-        '        return(pass);\n' +
-        '    }\n' +
+        '    set beresp.ttl = 0s;\n' +
+        '    set beresp.grace = 0s;\n' +
+        '    return(pass);\n' +
         '}\n'
     );
     t.end();